Simply enough. Which couples in your opinion should have ended up together at the end? Even more so in a harem anime. Who should have the main character ended up with?
I think keitaro should have gone with Otohime...they made a promise in the beginning where keitaro said he would go to TU and marry her, but instead screws up and marries naru...
I'd go for Ami X Ryuji (Toradora) and Sylvia x Teppei (Princess Lover). For now since I'm too tired to exhaust all animes that I've felt could've gone to a better pairing.